剔除一个文件中匹配某个关键词的那一行

__author__ = 'shuidiyou'
file_word_read= open("file_word",'r')
delete_file = r'2014-05-29' #To be matched keyword
words = file_word_read.readlines()
for words_list in words:
    if words_list.find(delete_file) == -1:  #Remove the line date,
        final_word = words_list.strip()     #Remove print blank lines
        print final_word
file_word_read.close()